| 摘要 |
An automatic transmission includes a fluid torque converter and a first and a second gear transmission mechanism, each of which has two coaxial drive members-a power input member and a power output member-and is selectable to any one of several speed ratios. Rotational power is output from the fluid torque converter to the first gear transmission mechanism. The torque converter, and the first gear transmission mechanism including the power input and power output members thereof, are all coaxial on a first axis. A through lay shaft extends along a second axis parallel to the first axis, passing through the second gear transmission mechanism so as to support it, and is rotationally coupled to the power input member of the second gear transmission mechanism. A gear wheel rotationally coupled to the power output member of the first gear transmission mechanism transfers rotational power to a gear wheel meshed with it and fixed to the through lay shaft, which transfers this rotational power to the power input member of the second gear transmission mechanism. A power output gear wheel is rotatably supported by the through lay shaft and is rotationally coupled to the power output member of the second gear transmission mechanism. |
